Expansion valve



FIG. 1 is a perspective view of an expansion valve showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side view thereof, a left side view thereof being a mirror image of the right side view thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a bottom view thereof.

The broken lines depict portions of the expansion valve that form no part of claimed design. 

CLAIM The ornamental design for expansion valve, as shown and described. 